﻿using System.Text;
using System.Text.RegularExpressions;

namespace Ln.Fram.Core.Helper;

public static class UnicodeHelper
{
	/// <summary>
	/// 字符串转Unicode码

	/// </summary>
	/// <returns>The to unicode.</returns>
	/// <param name="value">Value.</param>
	public static string StringToUnicode(string value)
	{
		byte[] bytes = Encoding.Unicode.GetBytes(value);
		StringBuilder stringBuilder = new StringBuilder();
		for (int i = 0; i < bytes.Length; i += 2)
		{
			// 取两个字符，每个字符都是右对齐。

			stringBuilder.AppendFormat("u{0}{1}", bytes[i + 1].ToString("x").PadLeft(2, '0'), bytes[i].ToString("x").PadLeft(2, '0'));
		}
		return stringBuilder.ToString();
	}

	/// <summary>
	/// Unicode转字符串
	/// </summary>
	/// <returns>The to string.</returns>
	/// <param name="unicode">Unicode.</param>
	public static string UnicodeToString(string unicode)
	{
		unicode = unicode.Replace("%", "\\");

		return new Regex(@"\\u([0-9A-F]{4})", RegexOptions.IgnoreCase | RegexOptions.Compiled).Replace(
				 unicode, x => string.Empty + Convert.ToChar(Convert.ToUInt16(x.Result("$1"), 16)));

		//string resultStr = "";
		//string[] strList = unicode.Split('u');
		//for (int i = 1; i < strList.Length; i++)
		//{
		//    resultStr += (char)int.Parse(strList[i], System.Globalization.NumberStyles.HexNumber);
		//}
		//return resultStr;
	}
}
